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习题练习:Impulse and momentum



 作者: admin发布日期: 2024-08-07 16:03   总分: 17分  得分: _____________

答题人: 匿名未登录  开始时间: 24年08月07日 15:54  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  94.16: A car of mass m, traveling at speed v,.nv+ t.iy u9ljv9(vzko00 snk stops in time t when maximum braking force is applied. Assuming the braking force is independent of mass, what time would be required to stop a car ofz0. y0( . jk+vitvkln9osv9nu mass 2m traveling at speed v?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.04: When the velocity of a moving object is doubled, its_______is also doubl u;t je:hd)sx2 7lja2ied. xjjhu)sd7i :22 ;tlae

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.06: Impulse, Fne iafieq z1s10;fhnc, 0t $\Delta$tis best related to:

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.05: Which one of the following choices is most closely associated with th(k 15jtxm dv* 5gaa*zye following observation about an isolated object: “The linear momentum of the object is cozxy*1tma5v*j( 5gdk anstant.”?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.21: The change in linear momentum of an object is always in the 93 zv ,jk8j3mtwjepq)v yqw h84tsr-4 same direction aq 4h4w3s,pvkzj et j-38mv)q89twry js the

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.08: How long must a 100 N net force act to produce a change in ukfz f6d73ci+sv.9t+trdv p4 md 8pl8 momentum of 2009 8idc kmpusdld7+vrfz 8t. +f p43tv6 kg.m/s?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.29: P and Q have the same momentum. Q can have more kinetltsx5b *0)t09n+m a0*kkymipoz*we mic energy than P if ie kmwl*x00mk yta+9n* )tmszo ip05*b t:

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  98.26: A ball with a mass of 0.50 kg and a speed of 6.0 m/s collidea o57n3 bnv2m moho,1es perpendicularly with a wall and bounces off with a so 53a2hobmnnm, v7 eo1peed of 4.0 m/s in the opposite direction. What is the magnitude of the impulse acting on the ball?

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.08: A 50 kilogram gymnast falls freely from a height of 4 meters ouhx eny9wpkq0ke 7+ b19a7k3v n to a trampoline. The trampoline then bounces her back upward with a speea1euvw99 k+ 7y3nxk0 p7eqbk hd equal to the speed at which she first struck the trampoline. What is the average force the trampoline applies on the gymnast?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.27: A 2.0 kg mass moves at 10.0 m/s when it has a collision in s hv;.ojsq,y,ib49em y pace. The mass’s speed was u94,io bjyeq.m sh v,y;nchanged, but the direction of its velocity was altered by $80^{\circ}$. If the collision lasted 0.25 s, what was the magnitude of the average force exerted on the mass?



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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.13: A bat striking a 0.125 kg-baseball is in contact with the ball for s2fq00 cg)r lo;fsie) a time of 0.03 seconds. The2erqfil0os;gcsf 0 )) ball travels in a straight line as it approaches and then leaves the bat. If the ball arrives at the bat with a velocity of 4.5 m/s and leaves with a velocity of-6.5 m/s, what is the magnitude of the average force acting on the ball?

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.43: An object of mass 4.0 g has atotal ki3y/f3 94xe sj wimcyw-netic energy of 100.0 J and an x-componentw9 3i c3/4ewsyfj m-xy of linear momentum equal to 24.0 kg.m/s. The object is moving in the x-y plane. What is they-component of the object’s linear momentum?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.05: At an instant of time t, a point object of mass M moves with velocity Vrhxk nyh, p,ay,b8q3t0*ib. v, has acceleration a, and is at position (x,y). In what direction must the linear momentum of the objec hpb ,i,ky0bvtyrhx.3 8,aq*nt be directed at this instant?

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.32: A rubber ball ovan)pm :x6xwy. chrd6h)9y:o f mass 2.0 kg falling straight downward hits the ground with a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 m/s. The colhx 69h:v d:) y)6ycwxpm n.roalision time of the ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average acceleration (in units of $m/s^{2}$ ) of the ball while it is in contact with the ground?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.33: A rubber ball of mass 2.0 kg falling strr3j8/2r 7m(xqbttt:ml z i qyp:ox5 8daight downward hits the ground with a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 m/s. The collision time of the ball with (qp5jz rl rq8 2xmtym73iobt: :/dt x8the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average force (in units of Newtons) exerted by the ground on the ball while they are in contact?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  14.12: A box of mass 5.0 kg is being .aun-exv7tx*qyr0 kf 6o y q,,g5qg(s pushed to the right across a horizontal surface while a constant frictional forceeykq57 *v6a.nyx,(-ou gsxqrq , f0gt of 8.0 N acts on the box. At some instant of time, the box has a speed of 4.0 m/s and an acceleration of$3.0\; m/s^{2}$ . What is the magnitude of the net force acting on the box at this instant?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.12: A box of mass 12.0 kg is being p3.0divbx 17(bsy p ildushed to the right across a horizontal surface. When the box has 12.0 J pi7i(x 0ybbdv3d1l.s of kinetic energy, a 12.0 N net force acts on it. Which one of the following choices best represents the magnitude of the linear momentum of the box at this instant?

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